Patents by Inventor Richard Fellows

Richard Fellows has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11411235
    Abstract: Methods are disclosed for detecting and lessening fuel starvation conditions in an operating fuel cell system. The fuel cell systems comprise a solid polymer electrolyte fuel cell with a regulating apparatus for regulating the pressure of fuel supplied to the anode inlet of the fuel cell, in which the outlet pressure from the regulating apparatus oscillates during operation. The methods involve monitoring an electrical output of the fuel cell during operation, determining the amplitude of oscillation in the electrical output, and then, if the determined amplitude of oscillation in the electrical output exceeds a predetermined amount thereby indicating a fuel starvation condition, taking a remedial action to lessen the fuel starvation condition.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: August 9, 2022
    Assignees: Daimler AG, Ford Motor Company
    Inventor: Richard Fellows
  • Publication number: 20200388866
    Abstract: A method for starting a fuel cell in a fuel cell system, at temperatures below the freezing point of water, includes, in a first step, that the hydrogen concentration in the anode is increased; after which, in a second step, an anode pressure is increased for a fixed period of time, and while air is supplied to the cathode, the maximum possible current is drawn from the fuel cell, and after which, in a third step, the fuel cell is switched in a load-free manner and the anode pressure is reduced. After the third step, the second step and the third step are repeated successively until a sufficient performance of the fuel cell for its normal operation is reached.
    Type: Application
    Filed: November 29, 2018
    Publication date: December 10, 2020
    Applicant: Daimler AG
    Inventors: Pere Antoni PASTOR NIGORRA, Sven SCHMALZRIEDT, Richard FELLOWS, Laura IWAN
  • Patent number: 10714771
    Abstract: Methods are disclosed for starting up a fuel cell system from starting temperatures below 0° C. The methods apply to systems comprising a solid polymer electrolyte fuel cell stack whose cathodes comprise an oxygen reduction reaction (ORR) catalyst and whose anodes comprise both a hydrogen oxidation reaction (HOR) catalyst and an oxidation evolution reaction (OER) catalyst. In the methods, from the beginning of starting up until the fuel cell temperature reaches 0° C., the fuel cell stack current is kept sufficiently low such that the current density drawn does not exceed the stack's capability for the oxidation evolution and the oxygen reduction reactions to occur at the anode and cathode respectively (i.e. current density drawn is less than the stack's maximum OER/ORR current density).
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: July 14, 2020
    Assignees: Daimler AG, Ford Motor Company, Nissan Motor Co., LTD.
    Inventors: Michael Procter, Yosuke Fukuyama, Richard Fellows, Takeshi Shiomi, Laura Iwan
  • Patent number: 10547067
    Abstract: Improved methods are disclosed for shutting down and storing a fuel cell system, particularly for below freezing temperature conditions. The methods comprise stopping power production from the fuel cell stack, monitoring its temperature, and repeatedly performing a predetermined warming operation if the stack temperature falls to a normal threshold temperature. In the improved methods, either an initial threshold temperature and/or an initial warming operation are used that differ from the respective normal threshold temperature and the predetermined warming operation.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: January 28, 2020
    Assignees: Daimler AG, Ford Motor Company, Nissan Motor Co., LTD.
    Inventors: Michael Procter, Yosuke Fukuyama, Richard Fellows, Takeshi Shiomi
  • Publication number: 20190386323
    Abstract: Methods are disclosed for detecting and lessening fuel starvation conditions in an operating fuel cell system. The fuel cell systems comprise a solid polymer electrolyte fuel cell with a regulating apparatus for regulating the pressure of fuel supplied to the anode inlet of the fuel cell, in which the outlet pressure from the regulating apparatus oscillates during operation. The methods involve monitoring an electrical output of the fuel cell during operation, determining the amplitude of oscillation in the electrical output, and then, if the determined amplitude of oscillation in the electrical output exceeds a predetermined amount thereby indicating a fuel starvation condition, taking a remedial action to lessen the fuel starvation condition.
    Type: Application
    Filed: February 2, 2018
    Publication date: December 19, 2019
    Inventor: Richard FELLOWS
  • Publication number: 20190207233
    Abstract: Methods are disclosed for starting up a fuel cell system from starting temperatures below 0° C. The methods apply to systems comprising a solid polymer electrolyte fuel cell stack whose cathodes comprise an oxygen reduction reaction (ORR) catalyst and whose anodes comprise both a hydrogen oxidation reaction (HOR) catalyst and an oxidation evolution reaction (OER) catalyst. In the methods, from the beginning of starting up until the fuel cell temperature reaches 0° C., the fuel cell stack current is kept sufficiently low such that the current density drawn does not exceed the stack's capability for the oxidation evolution and the oxygen reduction reactions to occur at the anode and cathode respectively (i.e. current density drawn is less than the stack's maximum OER/ORR current density).
    Type: Application
    Filed: August 25, 2017
    Publication date: July 4, 2019
    Inventors: Michael Procter, Yosuke Fukuyama, Richard Fellows, Takeshi Shiomi, Laura Iwan
  • Publication number: 20190058203
    Abstract: Improved methods are disclosed for shutting down and storing a fuel cell system, particularly for below freezing temperature conditions. The methods comprise stopping power production from the fuel cell stack, monitoring its temperature, and repeatedly performing a predetermined warming operation if the stack temperature falls to a normal threshold temperature. In the improved methods, either an initial threshold temperature and/or an initial warming operation are used that differ from the respective normal threshold temperature and the predetermined warming operation.
    Type: Application
    Filed: August 22, 2016
    Publication date: February 21, 2019
    Inventors: Michael Procter, Yosuke Fukuyama, Richard Fellows, Takeshi Shiomi
  • Patent number: 10170781
    Abstract: Improved methods are disclosed for shutting down and storing a fuel cell system, particularly for below freezing temperature conditions. The methods comprise stopping power production from the fuel cell stack, monitoring the amount of energy remaining in an energy supply, monitoring the stack temperature, and repeatedly performing a predetermined warming operation if the stack temperature falls to a normal threshold temperature and if the amount of energy remaining exceeds a certain minimum amount. In the improved methods, when the amount of remaining energy is less than or equal to the minimum amount, a final warming operation is performed that differs from the predetermined warming operation.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 1, 2019
    Assignees: Daimler AG, Ford Motor Company, Nissan Motor Co., Ltd.
    Inventors: Michael Procter, Yosuke Fukuyama, Richard Fellows, Takeshi Shiomi
  • Patent number: 9831509
    Abstract: A device for separating a fluid having a water and gas portion in a fuel cell system includes a fluid inlet an a fluid outlet with an outlet valve. The separating device includes a first reservoir region for collecting the water portion of the fluid. The first reservoir region includes a first outlet to feed the water portion in the direction of the fluid outlet. The separating device also includes a second reservoir region having a second outlet that feeds the water portion in the direction of the fluid outlet so that the first reservoir region 19 is connected in series in terms of flow via the second reservoir region with the fluid outlet. In an installation position of the separating device the first outlet is arranged lower than the second outlet so that deposits of the water portion completely covering the first outlet are prevented from flowing away.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: November 28, 2017
    Assignee: DAIMLER AG
    Inventors: Michael Procter, Richard Fellows
  • Patent number: 9748583
    Abstract: Bipolar plate assemblies are disclosed in which the transition fuel channels are offset from the transition oxidant channels in the transition regions on the active sides of the plates. This configuration allows for a reduced pressure drop in the coolant flow in the transition regions on the inactive, coolant side of the plates and thereby improves coolant flow sharing. The assemblies are suitable for use in high power density solid polymer electrolyte fuel cell stacks.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: August 29, 2017
    Assignees: Daimler AG, Ford Motor Company
    Inventors: Richard Fellows, Simon Farrington
  • Publication number: 20170084939
    Abstract: Improved methods are disclosed for shutting down and storing a fuel cell system, particularly for below freezing temperature conditions. The methods comprise stopping power production from the fuel cell stack, monitoring the amount of energy remaining in an energy supply, monitoring the stack temperature, and repeatedly performing a predetermined warming operation if the stack temperature falls to a normal threshold temperature and if the amount of energy remaining exceeds a certain minimum amount. In the improved methods, when the amount of remaining energy is less than or equal to the minimum amount, a final warming operation is performed that differs from the predetermined warming operation.
    Type: Application
    Filed: September 7, 2016
    Publication date: March 23, 2017
    Inventors: Michael Procter, Yosuke Fukuyama, Richard Fellows, Takeshi Shiomi
  • Patent number: 9231261
    Abstract: A system and method is provided for minimizing the degradation of a fuel cell after shutdown by forcing remaining air out of a fuel cell system. Upon fuel cell shutdown, the flow of air to the cathode of the fuel cell can be kept at a low rate. The flow of cathode exhaust gases along an exhaust conduit is substantially restricted while the pressure of the supply air supplied is increased. As a result, the pressure of the cathode exhaust gases in the exhaust conduit increases. The voltage of the fuel cell can be to deplete the oxygen in the supply air. The pressure of the supply air is decreased to a pressure lower than the pressure of the cathode exhaust gas in the exhaust conduit such that the cathode exhaust gas flows backward through the system to push out any remaining air.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: January 5, 2016
    Assignees: Daimler AG, Ford Motor Company
    Inventor: Richard Fellows
  • Publication number: 20150221964
    Abstract: Methods are disclosed for starting up a fuel cell system from subzero temperatures using the latent heat of crystallization available in a water supply maintained at above freezing temperature. During start-up, a water spray subsystem is used to spray water from the supply onto a heat exchange surface in a heat exchange element through which coolant from a fuel cell stack coolant circuit is circulating. The water freezes onto the heat exchange surface and the heat of crystallization is exchanged with the circulating coolant across the heat exchange surface, thus warming the coolant.
    Type: Application
    Filed: January 27, 2015
    Publication date: August 6, 2015
    Inventor: Richard Fellows
  • Patent number: 8968960
    Abstract: Ruthenium or a Ruthenium compound is applied to an anode structure according to a predetermined pattern, with only part of the anode active area containing Ru. The parts of the MEA that do not contain Ru are not expected to suffer degradation from Ru cross-over, so that overall degradation of the cell will be diminished. Having less precious metals will also translate into less cost.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: March 3, 2015
    Assignees: Daimler AG, Ford Motor Company
    Inventors: Hao Zhang, Herwig Haas, Andrew Leow, Mike Davis, Richard Fellows
  • Patent number: 8927170
    Abstract: The pressure drop associated with the coolant flow in the coolant transition regions of a typical high power density, solid polymer electrolyte fuel cell stack can be significant. This pressure drop can be reduced by enlarging the height of the coolant ducts in this region of the associated flow field plate so that the ducts extend beyond the plane of the plate. The height change can be accommodated by offsetting the ducts in adjacent cells in the stack and by employing non planar MEAs in this region. By reducing the pressure drop, improved coolant flow sharing is obtained.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: January 6, 2015
    Assignees: Daimler AG, Ford Motor Company
    Inventors: Simon Farrington, Richard Fellows
  • Publication number: 20140342264
    Abstract: Bipolar plate assemblies are disclosed in which the transition fuel channels are offset from the transition oxidant channels in the transition regions on the active sides of the plates. This configuration allows for a reduced pressure drop in the coolant flow in the transition regions on the inactive, coolant side of the plates and thereby improves coolant flow sharing. The assemblies are suitable for use in high power density solid polymer electrolyte fuel cell stacks.
    Type: Application
    Filed: May 12, 2014
    Publication date: November 20, 2014
    Applicants: Daimler AG, Ford Motor Company
    Inventors: Richard Fellows, Simon Farrington
  • Publication number: 20140242481
    Abstract: A device for separating a fluid having a water and gas portion in a fuel cell system includes a fluid inlet an a fluid outlet with an outlet valve. The separating device includes a first reservoir region for collecting the water portion of the fluid. The first reservoir region includes a first outlet to feed the water portion in the direction of the fluid outlet. The separating device also includes a second reservoir region having a second outlet that feeds the water portion in the direction of the fluid outlet so that the first reservoir region 19 is connected in series in terms of flow via the second reservoir region with the fluid outlet. In an installation position of the separating device the first outlet is arranged lower than the second outlet so that deposits of the water portion completely covering the first outlet are prevented from flowing away.
    Type: Application
    Filed: August 16, 2012
    Publication date: August 28, 2014
    Applicant: DAIMLER AG
    Inventors: Michael Procter, Richard Fellows
  • Publication number: 20130323616
    Abstract: A system and method is provided for minimizing the degradation of a fuel cell after shutdown by forcing remaining air out of a fuel cell system. Upon fuel cell shutdown, the flow of air to the cathode of the fuel cell can be kept at a low rate. The flow of cathode exhaust gases along an exhaust conduit is substantially restricted while the pressure of the supply air supplied is increased. As a result, the pressure of the cathode exhaust gases in the exhaust conduit increases. The voltage of the fuel cell can be to deplete the oxygen in the supply air. The pressure of the supply air is decreased to a pressure lower than the pressure of the cathode exhaust gas in the exhaust conduit such that the cathode exhaust gas flows backward through the system to push out any remaining air.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Applicants: FORD MOTOR COMPANY, Daimler AG
    Inventor: Richard Fellows
  • Publication number: 20130017471
    Abstract: To reduce degradation of a solid polymer fuel cell during startup and shutdown, a selectively conducting component is incorporated in electrical series with the anode components in the fuel cell. The component is characterized by a low electrical resistance in the presence of hydrogen or fuel and a high resistance in the presence of air. High cathode potentials can be prevented by integrating such a component into the fuel cell. A suitable selectively conducting component can comprise a layer of selectively conducting material, such as a metal oxide.
    Type: Application
    Filed: December 22, 2010
    Publication date: January 17, 2013
    Applicants: FORD MOTOR COMPANY, DAIMLER AG
    Inventors: Herwig Haas, Joy Roberts, Francine Berretta, Amy Shun-Wen Yang, Yvonne Hsieh, Guy Pepin, Andrew Leow, Richard Fellows, Nicolae Barsan
  • Publication number: 20120295178
    Abstract: The pressure drop associated with the coolant flow in the coolant transition regions of a typical high power density, solid polymer electrolyte fuel cell stack can be significant. This pressure drop can be reduced by enlarging the height of the coolant ducts in this region of the associated flow field plate so that the ducts extend beyond the plane of the plate. The height change can be accommodated by offsetting the ducts in adjacent cells in the stack and by employing non planar MEAs in this region. By reducing the pressure drop, improved coolant flow sharing is obtained.
    Type: Application
    Filed: May 16, 2011
    Publication date: November 22, 2012
    Applicants: FORD MOTOR COMPANY, DAIMLER AG
    Inventors: Simon Farrington, Richard Fellows